Loom stop mechanism



Dec. 29, 1925. Y A l 1,567,511

A. S. JOHNSON Loom sToP MECHANISM Filed July 23 1925 2 Sheets-Sheet 2 Patented Dec. 29, i925.

Uhll'lfll S'ifirfES rarer-ir ARTHUR S, JOHNSON, OF I-IOPEDALE, MASSACHUSETTS, ASSIG-NOR TO DRAPER COR- PORATION, 0F HOPEDALE, MASSACHUSETTS, A CORPGRATION OF MAINE.

LOOM STOP MECHAITISM.

Application led July 28, i925.

To ,all whom it may concern.'

Be it known that I, ARTHUR S. JOHNSON, a citizen of the United States, and a resident of Hopedale, in the county of W' orcoster and State of Massachusetts, have invented an improvement in Loom Stop Mechanisms, of which the following description, in connection with the accompanying drawings, is a. specication, like characters on the drawings representing like parts.

This invention relates to looms and more particularly to means for stopping the loom on the occurrence of a` wrap or weft fault.

lt is now the common practice to equip looms with means for stopping the loom when a warp thread breaks or becomes too slack for w living purposes, and also to stop the loom when the weft or filling fails to be l-aid in the shed. Such mechanisms, howcver, have introduced complications in the loom structure, and one of the objects of the present invention is to provide means for stopping the loom on the occurrence of a warp or weft fault, which mechanism shall be simple in construction and effective upon the occurrence of either fault to promptly bring the loom to rest.

ln weaving certain fabrics, particularly of line character, such as worsteds and the like, it is usual to employ a center fork wett stop mechanism, the weft fork of which mechanism is adapted to feel for the filling laid in the shed, and on its absence effect loom stoppage as the lay moves to its fropt position. In. such type of weft stop mechanism, whore a warp stop mechanism is also employed, an occurrence of a fault in the warp Lhas occasioned the stopping of the loom on a backward movement of the lay. In the usc of a warp stop mechanism associated with a center fork weft stop mechanism, should the former act to stop the loom on the backward movement of the lay, thc shuttle will be picked when the lay is in its backward position, and is liable to strike the center fork, thereby either causing breakage or forcing the shuttle through the warp threads.

In accordance with the present invention, th-e loom is brought to rest on the occurrence of either a warp or a weft fault when the lay is moving frontward, and consequently the shuttle is in its box and not liable to Serial No. 46,564.

occasion the defective action herein before noted.

ln carrying the invention into practical effect the warp stop mechanism and center fork weft stop mechanism act upon the same dog which is connected to the loom stopping means, so that in the event of a warp or a weft fault, the loom will be stopped as the lay is moving towards front position, so that the harnesses are more nearly level at such time and the warp threads are under less strain. The operative gets accustomed to having the loom stop in the same position, whether such stop is effected either by a warp or a weft fault.

The invention, new combination of parts and novel features thereof, will best be made clear from the following description and the accompanying drawings of one good form thereof.

In the drawings:

Fig. 1 is a side elevation of sufficient portions of a loom having the present inven tion applied thereto, to make clear the construction and mode of operation, the relation of parts being shown as the loom is being 'stopped due to a warp fault;

Fig. 2 is a perspective view with parts broken away, showing on an enlarged scale the train of mechanism associated with the loom stopping means;

Fig. 3 is an enlarged detail showing more particularly the dog and dog` carrier and its connection with the loom stopping' means; and l Fig. l is a detailed perspectiye view of one form of warp stop mechanism that may be advantageously employed to effect loom stoppage on frontward movement of the lay.

The loom frame l may be of usual construction now well-known, and has mount-ed thereon in the usual manner the lay swords 2 carrying the lay 3 which is given its beatup movement through a pitman l connected by a crank 5 to the crank shaft t3, as usual.

The center fork weft stop mechanism is shown as comprising the fork or tines 7 mounted upon a rocking head 8 pivotally mounted at 9 to lugs l0 extending from the lay 3. The inner portion of the head 8 is connected by a rod 11 to a crank arm 12 on the shaft 13 mounted in bearings le and 15 carried by the lay, and the lay itself has an opening 16 into which the 'fork may drop when a weft thread fails to be laid in the shed. The center weft fork stop mechanism thus far described is of the usual type, or may be, and secured to the outer end portion of the shaft 13, as at 17, is a dagger 18, which, as the lay goes back, rides upon the dagger rest 19, thereby lifting' the wett tork 7 out of the path of the shuttle as it is picked. On trontward movement of the lay and when the dagger 18 moves from its supporting relation with the dagger rest 1S), the

weight ot the dagger and connected parts causes the dagger 1 8 to drop and move the wett 'fork 7 towards the slot lli in the lay. It, at such time, the filling' hasbeen properly laid in the shed, the weft tork will engage the filling and the dagger 18l will be held in an upper position and not Vpermitted to drop to its itull throw, butshouldthe tillingl c not be laid in the shed under 'the wett fork, then the wett fork will move into the slot it without ol'istruction and the dagger 18 will drop to its lowest position as the lay moves ifi-outwardly and cause loom stoppage as will presently appear.

Securedfto the loom frame by a bolt 2l) is a bracket 21 provided with aslot` 22 whereby the bracket may be adjusted in position, and the upper surface 23y ot' the1 bracket attords a rest for the dagger 18 when the dagger is permitted to drop to its lowest position owing to Vfailure orfault in the lilling. Under such conditions, that is, on the occurrence of a weit fault, the .dagger is positioned to engage with a dog Vwhich is itself connected to the loom stopping mechanism to thereby effect loom stoppage as the lay moves frontivardlyland suxbstantiallyreaches front position, yat which time the| rwarp threads are evened and tension thereon is released.

Pivotally mountedion a bolt 23 adjustably secured to the bracket 21 by means ot the slot 24 is the dog carrier 25, best` shown by 3. and to the upper end portion ot the dogl carrier is pivotalh connected the dogl 26. vThe fdog 26 is mounted upon a pivot 2/ onthe dog' carrier and has a dmvn'wardly extending' linger 28 normally under the influence of a light spring' 29, yandto maintain the dog26 in its normal position relative to the dog carrier and dagger. y y

The lower end portion 30 of the ,dog carrier is connected to the loom stopping mechanism, herein shown in the present instance .of the invention as the shipper 31.L yThis connection with the loom stopping n'ieclianism may be variously contrived hut ashsnown consists et a link 32 having a p in and slot connection 33. with'the shipper I31. The rear end p'ortionof the link 32is`provided with a rod 311 which passes through an opening. in a swivel pin 35 mounted torrotative movenient in thelower end 30 of the dog' carrier.

It is desirable in most instances to yieldingly connect the dog carrier with the loom stopping mechanism, and in the present instance of the invention. the rod 34- is ol circular cross-section and a spring 3o is interposed between the swivel pin or block on the lower end of the dog carrier and the adjusting nut 87 on the bolt 34. Similarly, the opposite end portion of the rod l-l` which cxtends through the swivel pin or block 35 is provided with a spring 38 interposed bctween the adjusting nut 23S) and the adjacent side of the dog carrier or swivel block, the construction being such that upon movement of the dog` carrier upon its pivot in either direction, a yielding action will take place between the dog carrier and the link connecting' the dog carrier to the loom stopping` mechanism.

l From the construction thus 'tar describml it willbe apparent that upon the (n'currencc ot a 'li'ault in the wett or fillingv` the dagger 18 will drop to its lower or stopping position as hereinbetore described. and on iirontward n'iovement ot' the lay will strike the dogl 2n which is in its normal position relative to the dog` carrier and through the action ot the loom stopping mechanism or shipper 21 etfect loom stoppage.

It has not been deemed necessary herein to illustrate the tain of .mechanism between theshipper and power means of the loom, such as a beltkor clutch actuated by the shipper, since such` train ot mechanism is now well understood in the art, and the details thereof 'form no part ot' the present invention,

In accordance with thepresent invention asabove outlined, the lay will be arrested and the loom stopped when the lay is movin g frontwardly, and in order that such stopping of the loom may take place also upon the oecurrence oit a warp itault, means are provided for moving the dog 2G into the normal path ol movement of the dagger 18 on the occurrence oi a warp fault. Various types of warp stop mechanism may be employed and have associated therewith a train olf mechanism `for n'ioving the dog into the path of the dagger on the occurrence ol: a warp fault, but in the present instance ot the invention the warp stop mechanism is shown as comprising the side trames or warp supports 40 which may be connected to the opposite sides ot the loom as by the brackets 4l. Extending between the brackets 41 ot.

the warp stop mechanism are the drop wire guides 42 which are shown as passing through slots torined in the series ot drop wires 13. Y

,Mounted for rocking' movement `upon the main portion ot' the warp stop mechanism. as by the bracl-ets iv-I- is a sha'lt 45 havingl the. r nfrrdly extending arms Ll-( carrying the .il Vteeler o" detector 47. Secured to lll) llfa

the roclrshaft is the block 48 having a cam lug 49 which is normally engaged with a cam lug 50 carried by a sleeve 51 loosely mounted on the rock shaft 45 and normally pressed into operation with the cam 49 by a spring 52. Secured to the sleeve 51 is the arm 53 to Which is connected a rod 54 actuated from a going part of the loom, the construction being such that upon actuation of the rod 54 the rock shaft 45 Will be rocked back and forth to carry the feeler or detector 47 transversely of the series of drop Wires, as usual. In the present instance of the invention, the rod 54 is pivotally connected at 55 to a lever 56 pivotally mounted at 57 and normally bearing upon the cam 56 under the impulse ot' a spring 59, the construction bcing such that upon rotation ot' the cam 5S, which Vis shown as mounted on the under or cam shaft 60, the rock shaft 45 will be rocked during normal Weaviiflg operation.

Upon the occurrence ofl a Warp fault., suc-h as breakage or undue slaclincss, the associated drop Wire 43, as indicated in Fig. 1, will drop into the path of the detector or feeler 47 and thereby arrest its rocking movement, and such arrest of' the feeler or detector movement is utilized in the present invention to move the dog 26 into the path of the dagger 18 on the occurrence of a Warp fault, so that the loom Will be stopped as the lay moves towards and reaches front position.

Any suitable train of mechanism may be utilized between the Warp stop mechanism and the dog 26 to effect the intended pur pose, but as herein shown, a tlexible sheathed Wire 61 is utilized, one end of the sheathed Wire 61, as indicated in Fig. 4, rests against one end of an indicator Wire 61X and the other end of which rests against a portion of the sleeve 51, With the result that should the feeler or detector 47 be arrested by a drop Wire, the sleeve 51 will move longitudinally of the rock shaft 45 against the tension of the spring 52 and perforce move the flexible Wire 61 longitudinally in its sheath 62, and such longitudinal movement of the sheathed wire 61 is utilized to lift the dog 26h-om its normal position into the path of movement of the dagger 1S of the center forli Wett stop mechanism.

As indicated in Fig. 3, the upper arm of the dog carrier is provided With an opening 63 in which is secured a. block 64 through which extends the flexible sheathed Wire, the end of which rests against a block 65 carrying a pin 66, the end of which underlies the dog 26, as indicated in Fig. 3. From the construction described, it will be apparent that should a Warp fault occur, the sheathed Wire 61 Will be moved longitudinally in its sheath and lift the dog 26 into the path of movement'. of the dagger 18, so that, as the lay moves frontivardly, the dog` will be actuated and through the connection with the loom stopping mechanism, as described, etfect loom stoppage as the lay nieves towards front position, such condition being represented in Fig. 1.

lVhen the loom is stopped, it may be that the Weaver will turn back the lay without picking the shuttle, in which case either no filling Will be laid in the shed or the iilling is apt to get from beneath the filling forl, and if the loom -Were at once started under these conditions the dagger 16 would again eil'ect loom stoppage on the first beat-up regardlessy of Whether the stoppage has been caused by a warp or a wett fault. To prevent this, a shield 67 is connected to the bracket 21 by pins 68 which pass through diagonal slots 69 formed in the shield, so that should the shield be n'ioved rcaruuirdly it would be raised.

Pivotally mounted at 70 on the bracket 2 is a shield actuator '71 having a tail n adapted to be engaged by a spring finger 73 carried by the rock shaft 74 from which extends t-he finger 75 adapted to be engaged and cause rocking movement of the rock shaft 74 by the shipper as it moves to loom stopping position, the effect being that when the loom is stopped by either a Warp or Wett fault, the shield 67 Will be raised suliiciently high to support the dagger 16 in a path ot' movement above the dog 26, so that on starting the loom, loom stoppage will not again occur on the first beat-up of the lay. In order to return the shield 67 to its lowered position, as indicated in Fig. 2, it is provided With an abutment 76 and as the lay moves frontwardly on the first beat-up, the shield will be moved :trontwardly by the dog 18 and consequently positioned in its unshielcling or lowered position.

From the construction described it Will be noted that the present invention provides a center fork Wett stop mechanism and a vra p stop mechanism, and a sii'igle dog which is adapted to be engaged in its normal position by the dagger 18ct the center fork wett stop mechanism on the occurrence of a u'eft fault, and that when no weft fault occurs, such single dog is moved into position to be engaged by the'dagger to stop the loom on the occurrence of a Warp fault, the stopping action of the loom being effected in both instances when the lay is moving frontward and substantially reaches front position.

that is claimed is:

1. In a loom, the combination of a Warp stop mechanism and a center fork weft stop mechanism including a dagger, a single dog adapted to be actuated by the dagger on the occurrence of a Weft fault, a dog controller connected to the Warp stop mechanism to position the dog in the path of the dagger on the occurrence of' a Warp fault, loom stopping mechanism and connections between the dog and loom stopping mechanism to effect loom stoppage on frontvvard movement of the lay on the occurrence of either a Warp or Weft fault.

2. In a loom, the combination of a Warp stop mechanism and a center fork weft stop mechanism including a dagger, a dog normally positioned to be engaged by the dagger on the occurrence of a weft fault, means actuated by the Warp stop mechanism to move the dog into position to be engaged by said dagger on the occurrence of a iva-rp fault, and means for stopping the loom when the dog is actuated by the dagger asthe lay moves Yfrontward on the occurrence of either a Warp or weft fault.

3. In a loom, the combination of a Warp stop mechanism and a center fork weft stop mechanism, loom stopping mechanism, a dog connected to the loom stopping mechanism and normally positioned to be actuated to stop the loom by the center fork weft stop mechanism on the occurrence of a weft fault, means between the Warp stop mechanism and the dog to move the dog into position to be actuated by the center fork weft stop mechanism on the occurrence of a Warp fault.

4. In a loom, the combination yof a Warp stop mechanism and a center fork weft stop mechanism, loom stopping mechanism, a dog carrier connected to the loom stopping mechanism, a dog mounted on the dog carrier and normally positioned to be actuated to stop the loom by the center fork weft stop mechanism on the occurrence of a Wett fault,

and means actuated by a Warp fault for mov ing the dog into position to be actuated by the center fork vveft stop mechanism that the loom may be stopped near front position on the occurrence of either a Warp or weft fault.

5. In a loom, the combination of a warp stop mechanism and a Wett stop mechanism, a shipper, a dog connected to the shipper and normally positioned to be actuated to stop the loom on the occurrence of a weft fault, and means actuated on the occurrence ot' a Warp fault to move said dog into another position to stop the loom, that the loom may be brought to rest as the lay moves towards front position on the occurrence of either a warp or weft fault.

6. In a loom, the combination of a warp stop mechanism and center fork weft stop mechanism including a dagger, a shipper, a dog connected to the shipper and normally positioned to be actuated by the dagger to stop the loom on the occurrence ot a wett fault, and means actuated on the occurrence oiE a Warp `fault to move the dog into the path of the dagger for actuation thereby that the loom may be stopped with the lay in a lrontivard position on the occurrence ot either a wett or a warp fault.

7. In a loom, the combination olf a warp stop mechanism, a center :Fork wett stop mechanism including a dagger, a shipper, a pivotally mounted dog carrier connected to the shipper, a dog mounted on the dog carrier for engagement by the dagger on the occurrence ot a Wett fault, and means controlled by the Warp stop mechanism to move the dog into the path of the dagger on the occurrence of a Warp fault.

8. In a loom, the combination of a warp stop mechanism, a center forli wett stop mechanism including a dagger, a shipper, a pivotally mounted dog carrier connected to the shipper, a dog pivotally mounted on the dog carrier for engagement by the dagger on the occurrence of a weft fault, and means controlled by the warp stop mechanism to move the dog into the path ot the dagger on the occurrence ot' a warp fault.

9. In a loom, the combination of a warp stop mechanism, a center fork weft stop mechanism mounted on the lay and including a dagger, a dog normally positioned for engagement by the dagger on failure of the Wett, means actuated by the Warp stop mechanism to move the dog into the path o the dagger on the occurrence oil a warp lault, and means actuated by dagger movenunit `of the dog to stop the loom in frontward position on the occurrence ofi either a warp or weft fault.

In testimony whereof, I have signed my name to this specication.

ARTHUR S. JOHNSON. 

